Chemistry General Knowledge Questions and Answers: Chemistry GK

Chemistry-GK

31. Talc contains which one of the following ?  

A.  zinc,calcium,oxygen
B.  calcium,oxygen,tin
C.  magnesium,silicon,oxygen
D.  zinc,tin,sulphur

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32. Which one of the following substances is made up of only one type of atoms?  

A.  water
B.  hydrogen
C.  milk
D.  air

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33. Which one of the following is used as a mordant in dyeing and tanning indusrty?  

A.  Magnesium oxide
B.  magnesium carbonate
C.  magnesium chloride
D.  magnesium sulphate

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34. Which one of the following glasses is used in bullet proof screens?  

A.  Soda glass
B.  Pyrex glasss
C.  Jena glass
D.  Reinforced glass

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35. For Which one of the following is the density maximum ?  

A. Chloroform
B. Water
C. Benzene
D. Ice

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36. Which substance is used to retard the setting action of cement?  

A.  CaO
B.  AlO
C.  CaSO.2HO
D.  NaO + KO

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37. What is a mixture of potassium nitrate , powdered charcoal and sulphur called?  

A.  Glass
B.  Cement
C.  Paint
D.  Gun Powder

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38. Which one of the following is the softest?  

A.  Iron
B.  Aluminium
C.  Calcium
D.  Lithium

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39. The iron layered with zinc is called  

A.  Pig iron
B.  Cost iron
C.  Galvanised iron
D.  Steel

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40. When quick lime is added to water  

A.  Heat is liberated
B.  Heat is absorbed
C.  Temperature decreases
D.  No heat change takes place

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